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Latest commit 2e6ba19 Andreas Cadhalpun committed with lu-zero asfdec: make sure packet_size is non-zero before seeking
This fixes infinite loops due to seeking back.

Signed-off-by: Alexandra Hájková <>
Signed-off-by: Luca Barbato <>
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compat w32pthreads: Map MemoryBarrier to __sync_synchronize on mingw
doc doc: Improve the channelsplit example
libavcodec v210: Use separate sample_factors
libavdevice avfoundation: Simple capture
libavfilter lavfi: Use AV_CEIL_RSHIFT where needed
libavformat asfdec: make sure packet_size is non-zero before seeking
libavresample avresample: Mark avresample_buffer() as pointer to const
libavutil x86: Add ymm_reg struct
libswscale yuv2rgb: Document the color space coefficients
presets presets: spelling error in libvpx 1080p50_60
tests x86inc: Add debug symbols indicating sizes of compiled functions
tools avpacket: Replace av_free_packet with av_packet_unref
.gitattributes Treat all '*.pnm' files as non-text file
.gitignore Checkasm: assembly testing and benchmarking tool
.travis.yml travis: Enable OSX integration
COPYING.GPLv3 Add configure option to upgrade (L)GPL to version 3.
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file.
COPYING.LGPLv3 Add configure option to upgrade (L)GPL to version 3.
CREDITS partially rename FFmpeg to Libav
Changelog swfdec: support compressed swf
INSTALL doc: clarify configure features
LICENSE license: Mention that vf_interlace is GPL, not LGPL
Makefile configure: ObjC support
README doc: Add more information in the README doc: Add travis badge
RELEASE Make the RELEASE file match with the most recent tag
arch.mak ppc: vsx: Implement float_dsp
avconv.c avconv: Drop an impossible check
avconv.h avconv: add support for Intel QSV-accelerated transcoding
avconv_dxva2.c avconv_dxva2: add hevc support
avconv_filter.c avconv: Do not try to configure filter outputs without streams
avconv_opt.c avconv: add support for Intel QSV-accelerated transcoding
avconv_qsv.c avconv: add support for Intel QSV-accelerated transcoding
avconv_vda.c avconv: vda: Unlock the pixel buffer once it is accessed
avconv_vdpau.c avconv_vdpau: allocate video surface of VDPAU-specified size
avplay.c avplay: Allow to override the codec
avprobe.c avprobe: Unref the packet once it is used
cmdutils.c cmdutils: Check for and report the correct codec capability
cmdutils.h avconv: use read_file() for reading the 2pass stats
cmdutils_common_opts.h avplay: Accept cpuflags option
common.mak build: add Solaris symbol versioning
configure msvc: Fix libx264 linking
library.mak build: Support executable only ldflags Drop git- prefix from version labels


Build Status

Libav is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.


  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libavresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.


  • avconv is a command line toolbox to manipulate, convert and stream multimedia content.
  • avplay is a minimalistic multimedia player.
  • avprobe is a simple analisys tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.


The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.


Conding examples are available in the doc/example directory.


Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

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